pixeldelegate.cpp Example File
itemviews/pixelator/pixeldelegate.cpp
#include <QtGui>
#include "pixeldelegate.h"
PixelDelegate::PixelDelegate(QObject *parent)
: QAbstractItemDelegate(parent)
{
pixelSize = 12;
}
void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
if (option.state & QStyle::State_Selected)
painter->fillRect(option.rect, option.palette.highlight());
int size = qMin(option.rect.width(), option.rect.height());
int brightness = index.model()->data(index, Qt::DisplayRole).toInt();
double radius = (size/2.0) - (brightness/255.0 * size/2.0);
if (radius == 0.0)
return;
painter->save();
painter->setRenderHint(QPainter::Antialiasing, true);
painter->setPen(Qt::NoPen);
if (option.state & QStyle::State_Selected)
painter->setBrush(option.palette.highlightedText());
else
painter->setBrush(QBrush(Qt::black));
painter->drawEllipse(QRectF(option.rect.x() + option.rect.width()/2 - radius,
option.rect.y() + option.rect.height()/2 - radius,
2*radius, 2*radius));
painter->restore();
}
QSize PixelDelegate::sizeHint(const QStyleOptionViewItem & ,
const QModelIndex & ) const
{
return QSize(pixelSize, pixelSize);
}
void PixelDelegate::setPixelSize(int size)
{
pixelSize = size;
}
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Qt 4.4.3 |